<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="课程名称" prop="name">
        <el-input v-model="queryParams.name" placeholder="请输入课程名称" clearable @keyup.enter.native="handleQuery" />
      </el-form-item>
      <el-form-item label="所属专业" prop="specialityId">
        <el-select v-model="queryParams.specialityId" clearable filterable remote :loading="loading"
          placeholder="请选择所属专业">
          <el-option v-for="item in optionsSpeciality" :key="item.id" :label="item.specialityName" :value="item.id">
          </el-option>
        </el-select>
      </el-form-item>
      <!-- <el-form-item label="创建人id" prop="creatorId">
        <el-input
          v-model="queryParams.creatorId"
          placeholder="请输入创建人id"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item> -->

      <el-form-item label="课程状态" prop="validFlag">
        <el-select v-model="queryParams.validFlag" placeholder="是否有效" clearable>
          <el-option label="无效" :value="0" />
          <el-option label="有效" :value="1" />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button type="primary" plain icon="el-icon-plus" size="mini" @click="handleAdd"
          v-hasPermi="['student:course:add']">新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button type="success" plain icon="el-icon-edit" size="mini" :disabled="single" @click="handleUpdate"
          v-hasPermi="['student:course:edit']">修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button type="danger" plain icon="el-icon-delete" size="mini" :disabled="multiple" @click="handleDelete"
          v-hasPermi="['student:course:remove']">删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button type="warning" plain icon="el-icon-download" size="mini" @click="handleExport"
          v-hasPermi="['student:course:export']">导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="courseList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="主键" width="55" align="center" prop="id" />
      <el-table-column label="课程名称" align="center" prop="name" />
      <el-table-column label="课程图片" align="center" prop="resultImage" width="100">
        <template slot-scope="scope">
          <image-preview :src="scope.row.resultImage" :width="50" :height="50"/>
        </template>
      </el-table-column>
      <!-- <el-table-column label="课程排序" align="center" prop="sort" /> -->
      <!-- <el-table-column label="所属专业id" align="center" prop="specialityId" /> -->
      <el-table-column label="所属专业名称" align="center" prop="specialityName" />
      <el-table-column label="创建人" align="center" prop="creatorName" />
      <el-table-column label="课程状态" align="center" prop="validFlag">
        <template slot-scope="scope">
          <!-- 用active-value="1" inactive-value="0"时的active-value值类型为string，如果要求active-value值类型为number时，必须在其前面加上冒号(:)来转换 -->
          <el-switch v-model="scope.row.validFlag" :active-value="1" :inactive-value="0"
            @change="handleValidFlagChange(scope.row)"></el-switch>
        </template>
      </el-table-column>
      <el-table-column label="课程简介" align="center" prop="remark">
        <template slot-scope="scope">
          <div v-if='scope.row.remark && (scope.row.remark.length > 10)'>
            <el-popover title="详细" trigger="hover" placement="top" width="200">
              <p>{{ scope.row.remark }}</p>
              <div slot="reference">
                <p size="medium">{{ scope.row.remark | remark }}</p>
              </div>
            </el-popover>
          </div>
          <div v-else>
            <span>{{ scope.row.remark }}</span>
          </div>
        </template>
      </el-table-column>
      <el-table-column label="创建时间" align="center" prop="createTime" />
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button size="mini" type="text" icon="el-icon-edit" @click="handleUpdate(scope.row)"
            v-hasPermi="['student:course:edit']">修改</el-button>
          <el-button size="mini" type="text" icon="el-icon-folder-opened" @click="handleView(scope.row)"
            v-hasPermi="['student:course:view']">详情</el-button>
          <el-button size="mini" type="text" icon="el-icon-delete" @click="handleDelete(scope.row)"
            v-hasPermi="['student:course:remove']">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination v-show="total > 0" :total="total" :page.sync="queryParams.pageNum" :limit.sync="queryParams.pageSize"
      @pagination="getList" />

    <!-- 添加或修改课程对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="课程名称" prop="name">
          <el-input v-model="form.name" placeholder="请输入课程名称" />
        </el-form-item>
        <el-form-item label="所属专业" prop="specialityId">
          <el-select v-model="form.specialityId" clearable filterable remote :loading="loading" placeholder="请选择所属专业"
            style="width: 100%">
            <el-option v-for="item in optionsSpeciality" :key="item.id" :label="item.specialityName" :value="item.id">
            </el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="课程状态" prop="validFlag">
          <el-radio-group v-model="form.validFlag">
            <el-radio :label="1">有效</el-radio>
            <el-radio :label="0">无效</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="课程图片" prop="resultImage">
          <image-upload v-model="form.resultImage"/>
        </el-form-item>
        <el-form-item label="课程简介" prop="remark">
          <el-input v-model="form.remark" type="textarea" placeholder="请输入内容" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listCourse, getCourse, delCourse, addCourse, updateCourse } from "@/api/student/course";
import { listSpeciality } from "@/api/student/speciality";
export default {
  name: "Course",
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 课程表格数据
      courseList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        name: null,
        sort: null,
        specialityId: null,
        resultImage: null,
        specialityName: null,
        creatorId: null,
        validFlag: null,
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
      },
      // 搜索的专业列表
      optionsSpeciality: [],
    };
  },
  created() {
    this.getList();
    this.initOptionsSpeciality();
  },
  methods: {
    /** 查询课程列表 */
    getList() {
      this.loading = true;
      listCourse(this.queryParams).then(response => {
        this.courseList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        id: null,
        name: null,
        sort: null,
        specialityId: null,
        resultImage: null,
        specialityName: null,
        creatorId: null,
        createTime: null,
        updateTime: null,
        createBy: null,
        updateBy: null,
        validFlag: null,
        remark: null
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id)
      this.single = selection.length !== 1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset();
      this.open = true;
      this.title = "添加课程";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      const id = row.id || this.ids
      getCourse(id).then(response => {
        this.form = response.data;
        this.open = true;
        this.title = "修改课程";
      });
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.id != null) {
            updateCourse(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addCourse(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids;
      this.$modal.confirm('是否确认删除课程编号为"' + ids + '"的数据项？').then(function () {
        return delCourse(ids);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => { });
    },
    /** 详情按钮操作 */
    handleView(row) {
      this.handleToDetailPage(row.id)
    },
    // 跳转到任务详情页面(路由跳转)
    handleToDetailPage(id) {
      this.$router.push({
        name: 'courseDetail',
        query: {
          id: id
        },
      });
    },

    /** 导出按钮操作 */
    handleExport() {
      this.download('student/course/export', {
        ...this.queryParams
      }, `course_${new Date().getTime()}.xlsx`)
    },
    // 初始化专业列表
    initOptionsSpeciality() {
      listSpeciality({ pageNum: 1, pageSize: 10000 }).then((res) => {
        this.optionsSpeciality = res.rows;
        console.log("输出：")
        console.log(this.optionsSpeciality);
      });
    }
  },
  filters: {
    remark(value) {
      if (!value) {
        return
      } else {
        if (value.length > 10) {
          var target = value.substr(0, 10) + '....'
        } else {
          target = value
        }
        return target;
      }
    },
  }
};
</script>
